Yazaki CH-K100 - User Manual

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GAS-FIRED DOUBLE-EFFECT

ABSORPTION CHILLER-HEATER

This product is a gas-fired absorption unit which provides chilled water for cooling or

hot water for heating in central plant type air conditioning systems. Units with nominal

refrigeration capacities of 30, 40, 50, 60, 80, and 100 tons are complete with operating

and safety controls.

When this equipment is correctly applied, installed in accordance with Yazaki

INSTALLATION INSTRUCTIONS, and properly maintained, it can provide many years

of trouble-free operation.

CONTENTS

GENERAL Page

 ABSORPTION PRINCIPLE 2

 COOLING OPERATION 2

 HEATING OPERATION 3

CONTROLS

 GENERAL INFORMATION 4

 CONTROL ADJUSTMENTS 6

OPERATION

 COOLING 7

 HEATING 7

 SAFETY CONTROLS 7

 REMOTE CONTROL 7

 PRECAUTIONS 7

MAINTENANCE Page

 GENERAL INFORMATION 8

 ROUTINE MAINTENANCE 8

 MAINTENANCE INTERVALS 8

 EVACUATION OVERVIEW 8

 CHEMICAL MAINTENANCE 9

 WINTER SHUTDOWN 10

 TROUBLESHOOTING 10

 WATER QUALITY 11

 ERROR CODES 11

 STARTUP & MAINTENANCE

DATA SHEET 13

WARRANTY

 YAZAKI LIMITED EXPRESS

WARRANTY 14

OPERATING INSTRUCTIONS

CH-K30, 40, 50, 60, 80, 100

Other manuals for Yazaki CH-K100

Installation Instructions24 pages

Questions and Answers

A
Austin GrantAug 9, 2025
What to do if Yazaki Heater does not operate?
- B
  Bonnie MoranAug 9, 2025
  If the Yazaki Heater does not operate, there might be several reasons. First, check the LED for the Power indication on the Control Panel. If it is not illuminated, examine the main power disconnect, fuses, and breakers. Also, the solution pump might not be running. Check the THRP overload switch and the GP temperature. The solution pump may remain off until the GP temperature rises above 190°F (88°C). Finally, if the WTO temperature is above the set point, the unit may have shut down normally. To force operation, turn off power to the chiller-heater for 10 seconds, and then restore power. The chiller-heater should start up if the WTO sensor reading is above the set point.
C
Carrie WoodsAug 28, 2025
What to do if Yazaki CH-K100 Heater is not running but WTO temperature is above set point?
- C
  Cynthia RobertsAug 28, 2025
  If the Yazaki Heater is not running but the WTO temperature is above set point, it may not indicate a problem. If the chilled water loop has reached the desired set point, the unit will shut down until the WTO sensor reads a temperature 3.6°F (2°C) above the set point temperature. To force operation, turn off power to the chiller-heater, leave power off for 10 seconds, and then restore power. The chiller-heater should start up if the WTO sensor reading is above the set point.
B
bakerjustinNov 18, 2025
Why does my Yazaki CH-K100 have poor cooling capacity?
- R
  Randy KaiserNov 18, 2025
  If your Yazaki Heater has poor cooling capacity, several factors could be responsible. Start by checking for poor vacuum and evacuate the machine per normal maintenance procedure; a leak check may also be necessary. High inlet cooling water temperature can also be a cause, so inspect the cooling tower fan and fluid level. Low cooling water flow rate is another possibility; check the cooling tower sump and cooling water circuit strainers. Condenser/Absorber fouling or scale buildup can also reduce cooling capacity, so check the cooling water circuit strainers and consider a chemical de-scaling procedure. Finally, if everything appears normal but the leaving chilled water temperature is too high, it could be that the load of the chilled water circuit exceeds the capacity of the chiller-heate...

Summary

General Information

Absorption Principle Explained

Explains the working fluid, absorbent, and cycle components of the absorption system.

Cooling Operation Cycle

Details the process of the cooling cycle using HGE, LGE, Condenser, and Evaporator functions.

Heating Operation Cycle

Control System Overview

Control Panel and Interface

Describes the control panel location, its components, and interaction with external systems.

Adjusting Control Settings

Unit Operation Modes

Starting Cooling and Heating

Instructions on initiating cooling or heating modes using the control panel and settings.

Safety, Remote, and Precautions

Covers safety controls, remote operation capabilities, and essential operational precautions.

Maintenance Procedures

Maintenance Guidelines and Intervals

Covers general maintenance, routine tasks, and scheduled intervals for upkeep.

Evacuation and Chemical Maintenance

Details critical evacuation procedures and guidelines for chemical maintenance.

Chemical Maintenance Details

Shutdown and Winterization

Troubleshooting Common Issues

Water Quality Specifications

Error Code Diagnostics

Warranty Terms and Conditions

Yazaki Limited Express Warranty Details

Details the scope, duration, and specific conditions of the express warranty provided by Yazaki.

Yazaki CH-K100 Specifications

General

Brand	Yazaki
Model	CH-K100
Category	Heater
Language	English

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